This patch add an ioctl to shutdown f2fs, which stops all the further block
writes after this point.
Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
---
fs/f2fs/f2fs.h | 1 +
fs/f2fs/file.c | 14 ++++++++++++++
2 files changed, 15 insertions(+)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index ba30218..febad35 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -209,6 +209,7 @@ static inline bool __has_cursum_space(struct
f2fs_summary_block *sum, int size,
#define F2FS_IOC_START_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 3)
#define F2FS_IOC_RELEASE_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 4)
#define F2FS_IOC_ABORT_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 5)
+#define F2FS_IOC_GOINGDOWN _IO(F2FS_IOCTL_MAGIC, 6)
#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
/*
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 5df3367..de2f669 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1020,6 +1020,18 @@ static int f2fs_ioc_abort_volatile_write(struct file
*filp)
return ret;
}
+static int f2fs_ioc_goingdown(struct file *filp)
+{
+ struct inode *inode = file_inode(filp);
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ f2fs_stop_checkpoint(sbi);
+ return 0;
+}
+
static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
{
struct inode *inode = file_inode(filp);
@@ -1067,6 +1079,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
return f2fs_ioc_release_volatile_write(filp);
case F2FS_IOC_ABORT_VOLATILE_WRITE:
return f2fs_ioc_abort_volatile_write(filp);
+ case F2FS_IOC_GOINGDOWN:
+ return f2fs_ioc_goingdown(filp);
case FITRIM:
return f2fs_ioc_fitrim(filp, arg);
default:
--
2.1.1
------------------------------------------------------------------------------
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